Half to william f



(No Model.)

G. L. DOEHNE.

HYDRANT.

Patented Oct.. 7, 1890.

WMM/mow@ @mw i UNITED STATES PATENT OFFICE.

GEORGE L. DOEIINE, OF HARRISBURG, PENNSYLVANIA, ASSIGNOR OF ONE- HALF TOIVILLIAM F. VVEITMYER, OF SAME PLACE.

HYDRANT.

SPECIFICATION forming part of Letters Patent No. 437,831, dated October7, 1890.

Application filed April 1'7, 1890. Serial No. 3118,323. (No model.)

To all whom it may concern: v Beit known that I, GEORGE L. DOEHNE, ofHarrisburg', in the county of Dauphin and State of Pennsylvania, haveinvented certain new and useful Improvements in I'Iydrants; and I dohereby declare the following to be a full, clear, and exact descriptionof the same, reference being had to the accompanying drawings, formin ga part of this specification, ro and to the letters of reference markedthereon.

This invention relates to that class of hydrants in which the valvecontrolling the flow of water is connected to or operated by the pipeconstituting the discharge or eduction conduit, and has for its objectto provide a device of the character mentioned of exceedingly cheapdesign, not liable to get out of order, and which will shut oif thesupply of water automatically without the employment zo of springs orother delicate parts liable to get out of order or be destroyed by thecorrosive action of the water.

The invention therefore consists in certain novel details ofconstruction and combina- 2 5 tions and arrangements of parts, all aswill be hereinafter described, and pointed out particularly in theclaims at the end of this specification.,

Referring to the accompanying drawings,

3o Figure lis a side elevation of a hydrant constructed in accordancewith my invention. Fig. 2 is a vertical sectional view of the same. Fig.3 is a similar view with the valve open.

Like let-ters of reference in the several iig- 3 5 ures indicate thesame parts.

I have not deemed it necessary herein to show nor describe the spout orcasing of t-he hydrant, as the same may be of any preferred orwell-known kind and constitutes no part 4o of my present invention,

In the drawings, A indicates the casing, preferably of tubular section,with a screwthreaded aperture at the lower end for the end of thesupply-pipe A', (indicated in dotted lines,) and having at the upper endan annular seat a, above which the casing is screwthreaded internally,as shown. A plug B fits within the casing on the seat d and constitutesthe valve-seat for the valve O, mounted 5o on the eduction or dischargepipe D, which latter works through the plug B. The valve C slides in achamber formed by the cylinder B', preferably secured to or formedintegral with the plug, and is attached to the eduction-pipe by a singlepin, rivet, or similar connection arranged to permit of a limitedindependent movement of the valve, whereby it will seat squarely eventhough the valve face be slightly out of line.

The Valve constitutes a closure for the end of the eduction-pipe and isitself perforated at c outside of the valve-seat, the water beingadmitted to the eduetion-pipe through perforations d, arranged spirallyin the wall thereof and adapted to be successively uncovered as the pipeand valve are pressed downward. Perforations d, it will be noted, arefarther apart at the bottom than at the top, and consequently when thevalve is first opened but a very slight flow is let through, which Iiow7o increases steadily as the pipe moves downward, the increased frictionincident to the passage of a large body of water through the pipe beingcompensated for by the opening of a larger number of perforations to agiven movement of the pipe, as will be readily un` derstood.

As thus far described, when the eductionpipe is depressed the flow isimmediately established through the same; but if the power 8o whichdepressed the pipe be removed the valve will at once be carried back toits seat by the pressure of and friction of the water and the iiowchecked with a pound. N ow,in order to overcome this, a second chamberis provided above the casing A, preferably formed in a cap E, whichscrews into the top of casing A and holds the valve-seat plug in itsplace, as shown, and within this chamber works a piston e, rigidlysecured to the educ- 9o tionpipe and perforated at f.

Above the piston c is a loose valve-disk F, adapted to prevent thedownward passage of water through the perforations f, but to permit ofits free upward passage. Thus when the piston-chamber is filled withwater the cduction-pipe and valve may be readily moved downward, thewater passing readily through the perforations f, but they cannot moveupward faster than is permitted by the gradual roe Aleakage of wateraround the' piston e or through the perforations f, the valve beingthereby held open for a long time and all pounding or jarring when itcloses is entirely overcome.

In practice the piston-chamber should be filled with water when thedevice is set up, but there will be sufficient leakage to keep the samefull, and even if there is not the escape or drip aperture g for theeduction-pipe is arranged to pass into the same when the pipe is atlowest position, as shown in Fig. 3. WVhen the Valve is closed and thepipe elevated, the drip-aperture is above the cap E and affords a freeegress for the wat-er in the eductionpipe, overcoming all danger of thesame freezing and splitting the pipe.

From the above description it will be seen that all the fittings are ofthe simplest and cheapest character, requiring little, if any, specialmachinery in their production, and may be assembled and placed inworking orderby unskilled labor.

Having thus described my invention, what 1. In a hydrant'of thecharacter specified, the combination, with the movable eductionpipe, thevalve on the end thereof, and the piston having upwardly-.opening valvestherein mounted thereon above the valve, of the Valve-casingcommunicating with the supplypipe, the valve-seat in said casing, andthe piston-chamber above the same, substantially as described.

2. In a hydrant of the character specified, the combination,` with themovable eductionpipe having the valve on the lower end and the valvedpiston above the valve, of the valvecasing communicating with thesupply-pipe, the valve-seat in said casing, the piston-chamber above theValve-casing, and the drip or vent opening in the eduction-ppecommunieating with the piston-chamber at one point in its movement,substantially as described.

3. In a hydrant such as described, the combination, with the movableeduction pipe having the perforated valve on the lower end and havingthe perforations arranged successively above said valve, of thevalve-casing having the plug therein with the annular valve-seatcontacting with the valves inside the line of the perforations therein,and the cylinder in which the 'Valve works, substantially as described.

4. In a hydrant such as described, the combination, with the movableeduction pipe having the valve mounted thereon at the lower end and theperforations therein above the' valve, of the valve-casing, thepiston-casing above the valve-casing, the vent or drip opening adaptedto open into the piston-casing when the valve is open and above thecasing adapted to be covered by the plug through whichthe pipe works,the perforated piston Working in the piston-chamber mounted rig-v idlyon the pipe, and the lloose valve'resting on said piston, substantiallyas described.-

GEO. L. DOEHNE. Witnesses:

THOMAS DURANT, ALEX. S. SrEUARr.I

